| 摘要 |
PURPOSE:To ensure an automatic correction for a built-in light source of correction, by installing a rubbing member containing a light source for correction at the face side which is opposite to a detecting means for the thermal luminescence dose. CONSTITUTION:During the correction, a slider 49 is driven toward an arrow A so that a light source 47 for correction comes to the position of an ampoule 41. Then the value of the correcting light source is measured at the position of each ampoule 41 to carry out a correction. After the correction, the slider 49 is driven to the opposite side to the arrow A by a motor 55 to return up to the position shown in the diagram. When a thermal luminescence pass part 48 is cleaned, the slider 49 is driven toward the arrow A so that the part 48 is opposite to a cleaning hole 80. Under such conditions, a light shielding plate 81 is pulled toward an arrow B to open the hole 80. Thus the glass 82 of the part 48 is cleaned. |
